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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "SurfaceControl"
#include <stdint.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <android/native_window.h>
#include <utils/Errors.h>
#include <utils/Log.h>
#include <utils/threads.h>
#include <binder/IPCThreadState.h>
#include <ui/DisplayInfo.h>
#include <ui/GraphicBuffer.h>
#include <ui/Rect.h>
#include <gui/BufferQueueCore.h>
#include <gui/ISurfaceComposer.h>
#include <gui/Surface.h>
#include <gui/SurfaceComposerClient.h>
#include <gui/SurfaceControl.h>
namespace android {
// ============================================================================
// SurfaceControl
// ============================================================================
SurfaceControl::SurfaceControl(
const sp<SurfaceComposerClient>& client,
const sp<IBinder>& handle,
const sp<IGraphicBufferProducer>& gbp,
bool owned)
: mClient(client), mHandle(handle), mGraphicBufferProducer(gbp), mOwned(owned)
{
}
SurfaceControl::SurfaceControl(const sp<SurfaceControl>& other) {
mClient = other->mClient;
mHandle = other->mHandle;
mGraphicBufferProducer = other->mGraphicBufferProducer;
mOwned = false;
}
SurfaceControl::~SurfaceControl()
{
// Avoid reparenting the server-side surface to null if we are not the owner of it,
// meaning that we retrieved it from another process.
if (mClient != nullptr && mHandle != nullptr && mOwned) {
SurfaceComposerClient::doDropReferenceTransaction(mHandle, mClient->getClient());
}
release();
}
void SurfaceControl::destroy()
{
if (isValid()) {
SurfaceComposerClient::Transaction().reparent(this, nullptr).apply();
}
release();
}
void SurfaceControl::release()
{
// Trigger an IPC now, to make sure things
// happen without delay, since these resources are quite heavy.
mClient.clear();
mHandle.clear();
mGraphicBufferProducer.clear();
IPCThreadState::self()->flushCommands();
}
void SurfaceControl::disconnect() {
if (mGraphicBufferProducer != nullptr) {
mGraphicBufferProducer->disconnect(
BufferQueueCore::CURRENTLY_CONNECTED_API);
}
}
bool SurfaceControl::isSameSurface(
const sp<SurfaceControl>& lhs, const sp<SurfaceControl>& rhs)
{
if (lhs == nullptr || rhs == nullptr)
return false;
return lhs->mHandle == rhs->mHandle;
}
status_t SurfaceControl::clearLayerFrameStats() const {
status_t err = validate();
if (err != NO_ERROR) return err;
const sp<SurfaceComposerClient>& client(mClient);
return client->clearLayerFrameStats(mHandle);
}
status_t SurfaceControl::getLayerFrameStats(FrameStats* outStats) const {
status_t err = validate();
if (err != NO_ERROR) return err;
const sp<SurfaceComposerClient>& client(mClient);
return client->getLayerFrameStats(mHandle, outStats);
}
status_t SurfaceControl::validate() const
{
if (mHandle==nullptr || mClient==nullptr) {
ALOGE("invalid handle (%p) or client (%p)",
mHandle.get(), mClient.get());
return NO_INIT;
}
return NO_ERROR;
}
status_t SurfaceControl::writeSurfaceToParcel(
const sp<SurfaceControl>& control, Parcel* parcel)
{
sp<IGraphicBufferProducer> bp;
if (control != nullptr) {
bp = control->mGraphicBufferProducer;
}
return parcel->writeStrongBinder(IInterface::asBinder(bp));
}
sp<Surface> SurfaceControl::generateSurfaceLocked() const
{
// This surface is always consumed by SurfaceFlinger, so the
// producerControlledByApp value doesn't matter; using false.
mSurfaceData = new Surface(mGraphicBufferProducer, false);
return mSurfaceData;
}
sp<Surface> SurfaceControl::getSurface() const
{
Mutex::Autolock _l(mLock);
if (mSurfaceData == nullptr) {
return generateSurfaceLocked();
}
return mSurfaceData;
}
sp<Surface> SurfaceControl::createSurface() const
{
Mutex::Autolock _l(mLock);
return generateSurfaceLocked();
}
sp<IBinder> SurfaceControl::getHandle() const
{
Mutex::Autolock lock(mLock);
return mHandle;
}
sp<IGraphicBufferProducer> SurfaceControl::getIGraphicBufferProducer() const
{
Mutex::Autolock _l(mLock);
return mGraphicBufferProducer;
}
sp<SurfaceComposerClient> SurfaceControl::getClient() const
{
return mClient;
}
void SurfaceControl::writeToParcel(Parcel* parcel)
{
parcel->writeStrongBinder(ISurfaceComposerClient::asBinder(mClient->getClient()));
parcel->writeStrongBinder(mHandle);
parcel->writeStrongBinder(IGraphicBufferProducer::asBinder(mGraphicBufferProducer));
}
sp<SurfaceControl> SurfaceControl::readFromParcel(Parcel* parcel)
{
sp<IBinder> client = parcel->readStrongBinder();
sp<IBinder> handle = parcel->readStrongBinder();
if (client == nullptr || handle == nullptr)
{
ALOGE("Invalid parcel");
return nullptr;
}
sp<IBinder> gbp;
parcel->readNullableStrongBinder(&gbp);
// We aren't the original owner of the surface.
return new SurfaceControl(new SurfaceComposerClient(
interface_cast<ISurfaceComposerClient>(client)),
handle.get(), interface_cast<IGraphicBufferProducer>(gbp), false /* owned */);
}
// ----------------------------------------------------------------------------
}; // namespace android
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